package com.ezgo.erc.master.utils;

import java.net.URLDecoder;
import java.net.URLEncoder;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.codec.binary.Hex;
import org.apache.commons.lang3.StringEscapeUtils;

/**
 * 编码转码帮助类
 * 
 * @author devintam
 * 
 * @date 2015-07-09
 *
 */
public class EncodeUtil {

	private static final char[] BASE62 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
			.toCharArray();

	/**
	 * Hex编码.
	 * 
	 * @param input
	 * @return String
	 */
	public static String encodeHex(byte[] input) {
		return Hex.encodeHexString(input);
	}

	/**
	 * Hex解码.
	 * 
	 * @param String
	 * @return byte[]
	 */
	public static byte[] decodeHex(String input) throws Exception {
		return Hex.decodeHex(input.toCharArray());
	}

	/**
	 * Base64编码.
	 * 
	 * @param input
	 * @return String
	 */
	public static String encodeBase64(byte[] input) {
		return Base64.encodeBase64String(input);
	}

	/**
	 * Base64编码, URL安全(将Base64中的URL非法字符'+'和'/'转为'-'和'_', 见RFC3548).
	 * 
	 * @param input
	 * @return String
	 */
	public static String encodeUrlSafeBase64(byte[] input) {
		return Base64.encodeBase64URLSafeString(input);
	}

	/**
	 * Base64解码.
	 * 
	 * @param String
	 * @return byte[]
	 */
	public static byte[] decodeBase64(String input) {
		return Base64.decodeBase64(input);
	}

	/**
	 * Base62编码。
	 * 
	 * @param input
	 * @return String
	 */
	public static String encodeBase62(byte[] input) {
		char[] chars = new char[input.length];
		for (int i = 0; i < input.length; i++) {
			chars[i] = BASE62[((input[i] & 0xFF) % BASE62.length)];
		}
		return new String(chars);
	}

	/**
	 * Html 转码.
	 * 
	 * @param html
	 * @return String
	 */
	public static String escapeHtml(String html) {
		return StringEscapeUtils.escapeHtml4(html);
	}

	/**
	 * Html 解码.
	 * 
	 * @param htmlEscaped
	 * @return String
	 */
	public static String unescapeHtml(String htmlEscaped) {
		return StringEscapeUtils.unescapeHtml4(htmlEscaped);
	}

	/**
	 * Xml 转码.
	 * 
	 * @param xml
	 * @return String
	 */
	@SuppressWarnings("deprecation")
	public static String escapeXml(String xml) {
		return StringEscapeUtils.escapeXml(xml);
	}

	/**
	 * Xml 解码.
	 * 
	 * @param xmlEscaped
	 * @return String
	 */
	public static String unescapeXml(String xmlEscaped) {
		return StringEscapeUtils.unescapeXml(xmlEscaped);
	}

	/**
	 * URL 编码, Encode默认为UTF-8.
	 * 
	 * @param part
	 * @return String
	 */
	public static String urlEncode(String part) throws Exception {
		return URLEncoder.encode(part, Constants.DEFAULT_ENCODING);
	}

	/**
	 * URL 解码, Encode默认为UTF-8.
	 * 
	 * @param part
	 * @return String
	 */
	public static String urlDecode(String part) throws Exception {
		return URLDecoder.decode(part, Constants.DEFAULT_ENCODING);
	}
}
